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authorIngo Molnar <mingo@kernel.org>2015-07-17 14:17:19 +0200
committerIngo Molnar <mingo@kernel.org>2015-07-17 14:17:19 +0200
commita6acd6a41168dc304738e84c8360cda9a6b86887 (patch)
tree62ee9c21670b825e50b7c8e6d92f0b2948977ec2 /tools
parent65ea03e31e5ab47f784b1a701419264af97d3205 (diff)
parent3c71ba3f80bbd476bbfb2a008da9b676031cbd32 (diff)
Merge tag 'perf-urgent-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent
Pull perf/urgent fixes from Arnaldo Carvalho de Melo: - Fix misplaced check for HAVE_SYNC_COMPARE_AND_SWAP_SUPPORT in the auxtrace code, which made 'perf record' fail straight away in some architectures, even when auxtrace wasn't involved. (Adrian Hunter) - Really allow to specify custom CC, AR or LD (Alexey Brodkin) Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'tools')
-rw-r--r--tools/perf/Makefile.perf19
-rw-r--r--tools/perf/util/auxtrace.c10
2 files changed, 21 insertions, 8 deletions
diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
index 7a4b549214e3..bba34636b733 100644
--- a/tools/perf/Makefile.perf
+++ b/tools/perf/Makefile.perf
@@ -109,9 +109,22 @@ $(OUTPUT)PERF-VERSION-FILE: ../../.git/HEAD
$(Q)$(SHELL_PATH) util/PERF-VERSION-GEN $(OUTPUT)
$(Q)touch $(OUTPUT)PERF-VERSION-FILE
-CC = $(CROSS_COMPILE)gcc
-LD ?= $(CROSS_COMPILE)ld
-AR = $(CROSS_COMPILE)ar
+# Makefiles suck: This macro sets a default value of $(2) for the
+# variable named by $(1), unless the variable has been set by
+# environment or command line. This is necessary for CC and AR
+# because make sets default values, so the simpler ?= approach
+# won't work as expected.
+define allow-override
+ $(if $(or $(findstring environment,$(origin $(1))),\
+ $(findstring command line,$(origin $(1)))),,\
+ $(eval $(1) = $(2)))
+endef
+
+# Allow setting CC and AR and LD, or setting CROSS_COMPILE as a prefix.
+$(call allow-override,CC,$(CROSS_COMPILE)gcc)
+$(call allow-override,AR,$(CROSS_COMPILE)ar)
+$(call allow-override,LD,$(CROSS_COMPILE)ld)
+
PKG_CONFIG = $(CROSS_COMPILE)pkg-config
RM = rm -f
diff --git a/tools/perf/util/auxtrace.c b/tools/perf/util/auxtrace.c
index 7e7405c9b936..83d9dd96fe08 100644
--- a/tools/perf/util/auxtrace.c
+++ b/tools/perf/util/auxtrace.c
@@ -53,11 +53,6 @@ int auxtrace_mmap__mmap(struct auxtrace_mmap *mm,
{
struct perf_event_mmap_page *pc = userpg;
-#if BITS_PER_LONG != 64 && !defined(HAVE_SYNC_COMPARE_AND_SWAP_SUPPORT)
- pr_err("Cannot use AUX area tracing mmaps\n");
- return -1;
-#endif
-
WARN_ONCE(mm->base, "Uninitialized auxtrace_mmap\n");
mm->userpg = userpg;
@@ -73,6 +68,11 @@ int auxtrace_mmap__mmap(struct auxtrace_mmap *mm,
return 0;
}
+#if BITS_PER_LONG != 64 && !defined(HAVE_SYNC_COMPARE_AND_SWAP_SUPPORT)
+ pr_err("Cannot use AUX area tracing mmaps\n");
+ return -1;
+#endif
+
pc->aux_offset = mp->offset;
pc->aux_size = mp->len;